In a randomized, double-blind clinical trials of a newvaccine, infants were randomly divided into two groups. Subjects in group 1 received the new vaccine while subjects in group 2 received a control vaccine. After the firstdose, 118of 729subjects in the experimental group (group 1) experienced feveras a side effect. After the firstdose, 62of 612 of the subjects in the control group(group 2) experienced feveras a side effect. Construct a 90%confidence interval for the difference between the two population proportions,p1 - p2.Usex1 =118,n1 =729,x2 =62,andn2 =612.

The 90% confidence interval for p1 - p2 is (__?___, ___?__)